Borrowed fromLate Latinmnemonicus or itsetymonAncient Greekμνημονῐκός(mnēmonĭkós,“pertaining to memory or remembrance, memorial”) +English-ic(suffix meaning ‘of or pertaining to’ forming adjectives).Mνημονῐκός(Mnēmonĭkós) is derived fromμνήμων(mnḗmōn,“mindful, remembering”) +-ῐκός(-ĭkós,suffix meaning ‘of or pertaining to’ forming adjectives); whileμνήμων(mnḗmōn) is fromμνάομαι(mnáomai,“to be mindful, remember”) (fromProto-Indo-European*men-(“to mind; to think”)) +-μων(-mōn,suffix forming adjectives andagent nouns).[1]
Noun sense 1 (“something used to help in remembering a thing”) is borrowed fromLatinmnēmonicum(“something used to help in remembering a thing”), fromAncient Greekμνημονικόν(mnēmonikón,“something used to help in remembering a thing”), a noun use of theneuter form ofμνημονῐκός(mnēmonĭkós,adjective): seeetymology 1. Noun sense 3 (“synonym of mnemonics”) is borrowed fromLate Latinmnemonica, a noun use of thefeminine form ofmnemonicus: see etymology 1.[1]
2003, Alex Kimbell, chapter 3, inThe Unbridgeable Divide: A Love Story, Market Harborough, Leicestershire: Matador,→ISBN, section I,page54:
Mr Avery was a great believer inmnemonics; he had one for every possible aspect of flying – which was as good a way as any for student pilots to familiarise themselves with their new environment, but unless used on a daily basis could also be dangerous, for there were so many of them.